Furnace



July 26, 1932. g. c, EE 1,869,228

'FURNACE Filed July 26, 1930 2 Sheets-Sheet 1 37 -1. o w l I 1 I I 26 29 30 6 (f d. fi ulzer INVENTOR ATTORNEY Patented July 26 1932 UNITED STATES JOHN G. SUBER, or DESI-ILEB, onto FURNACE Application filed July 26, 1930. Serial No. 470,931.

This invention relates to a hot air furnace, the general object of the invention being to so construct and arrange the parts that the maximum amount of heat will be secured from the minimum amount of fuel and the building in which the furnace is used will be heated shortly after a fire is started in the furnace.

This invention also consists in certain other features of construction and in the com bination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claim. 7

In describing the invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which Figure 1 is a vertical sectional view through the invention.

Figure 2 is a transverse sectional View.

Figure 3 is a view partly in section of the heat trap or radiator.

Figure 4 is a detail View showing how the heat trap has its nipple connected with the nipple of the combustion chamber.

In these drawings, the numeral 1 indicates the outer casing of the furnace which is provided with the lining 2 and the upper part of which is formed with the nipples 3 to which are connected the pipes which lead the heated air from the furnace to the rooms to be heated. The casing of the fire pot is shown at 4 and is located in the lower part of the outer casing and is formed with an enlarged lower part 4 which forms the ash pit, the extending portion of this part 4; extending to the front of the casing 1 where said casing is formed with an opening 5 which is closed by a door 6 so that ashes can be removed from the ash pit and this door also serves as a damper for controlling the flow of air into the ash pit.

Thecasing 4 is formed with an outwardly extending flange 7 which has, its outer edge turned up, 9 is attached to the turned up part 8, as shown. This casing 9 forms the combustion chamber and has its front part extended to the front of the casing, as shown at 9', and this part of the outer casing is formed with openings covered by the doors 10 and 10 which permit fuel to be placed in the fire pot.

The vertical walls of the upper part of the casing 1 are covered with the fire'brick 11 and a ring 12 of fire brick is seated on the flange 7 and forms a continuation" of the fire brick lining 11.

The casing 9 1S formed with a dome-shaped as at 8, and the bottom of a casing top 13 and said casing has an outlet nipple 14 at the top of the rear part thereof. An

arc-shaped casing 15 is placed in the space between the outer casing and the rear part of the casing 9 and is spaced from said outer casing and the casing 9 and is supported from the brackets 16 fastened to the rear part of the casing &. The front of the casing 15, at the top thereof, is formed with a nipple 17 which connectswith the nipple 14: and the rear part of said casing 15, at the top thereof, is formed with a nipple 18 which connects with the chimney pipe 20 carried by the casing 1. A partition plate 21 is arranged in the casing 15 and extends from thetop thereof to a point an appreciable distance from the bottom of the casing, one side edge of this partition being connected with the rear wall of the casing 15 and its other side edge to a front wall thereof, as clearly shown in Figure 2. This partition forms a bafiie for causing the products of combustion from the chamber 9 to flow downwardly through the casing 15 andthen upwardly through said casing and escape through the nipple 18 into the chimney pipe. Thus the products of combustion are 7 held in the casing 15 for some time so that this casing is highly heated a is connected at'its rear end to an arm on the shaft 26 of the damper. A water tank 27 is arrangedin the front of the furnace and is in communication with the front of the space formed by the casing 1 so that when water is placed in this tank, the air being heated in the casing 1 will be moistened. The grate bars 28 are pivoted in the fire box and have arms 29 depending therefrom which are connected with the shaker rod 30 operated by the hand lever 31.

When the fire is first built inthe furnace, the damper 23 is opened so that there is a direct draft from the chimney to the combustion chamber and then when the fire is well started, the damper is closed so that the products of combustion will pass from the combustion chamber into the casing 15 in which it will be caused to flow downwardly by the baffle 21 and then upwardly before it passes into the chimney pipe. Thus this casing 15 is highly heated and will impart its heat to the air in the casing 1 and this air is also heated by being in contact with the walls of the combustion chamber and the fire pot; Air can be admitted into the casing 1 in any suitable manner.

The casing 15 has its nipple 17 fitting in an annular groove formed in the nipple 14; and these parts are connected together by means of the slotted lugs 34 on the casing 15 extending through slots in the lugs 35 on the nipple 14, with wedge pieces 36 extending through the slots in the lugs 34 so that when these wedge pieces are put in place, the parts are drawn together in a smoke-tight manner. Vertical lugs 37 are carried by the brackets 16 and engage the lower end of the casing 15 to prevent inward movementof this part of the casing 15. Thus the casing 15 is held in place without the use of bolts or rivets.

A clean-out opening 32 extends from the rear part of the outer casing to the bottom of the arc-shaped casing and said opening is closed by a cover 33 so that soot can be removed from said arc-shaped casing.

It is thought from the foregoing description that the advantages and novel features of the invention will be readily apparent. I

It is to be understood that changes may be made in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the appended claim. What I claim is The combination of nipples formed ona heat trap and combustion drum of a furnace,

one nipple being provided with spaced double the lugs of the combustion drum nipple, and 7 supports for the trap.

In testimony whereof I alfix my signature.

JOHN C. SUBER. 

